FUS toxicity in fruit flies was linked to RNA polymerase II
Original source
Human FUS is toxic via association with RNA polymerase II in Drosophila. (opens in a new tab)Compass summarised this from the study's abstract.
Study details
- Studied in
- Human, Animal, Cells
Related topics
Excess normal human FUS damaged neurons and shortened lifespan in fruit-fly models through an interaction with RNA polymerase II. Removing FUS’s nuclear localisation sequence prevented this toxicity in the flies, even though it moved FUS into the cell cytoplasm. The findings point to a possible nuclear mechanism for FUS-related disease, but do not yet change treatment for people with ALS or frontotemporal lobar degeneration.
Why this matters
The study suggests that FUS toxicity may involve abnormal effects inside the nucleus, rather than only the cytoplasmic inclusions seen in disease. This could help guide future research into FUS-related ALS and frontotemporal lobar degeneration, but the work was performed in fruit flies and does not establish a treatment or prove the same mechanism operates in people with ALS.
Limitations and context
This was a primary research study in Drosophila models, with additional observations from neurons of people with FUS-positive frontotemporal lobar degeneration. The results do not establish that the mechanism causes human ALS, and no treatment or clinical benefit was tested.